I still don't get twitter. But it seems like it's turning into something large public entities have to have a presence on. And the character limitation keeps it

I still don't get twitter. But it seems like it's turning into something large public entities have to have a presence on. And the character limitation keeps it from turning to a complicated public image/branding/market problem which could keep companies from participating. But I'm still not sure what the value for John Q. Public is in twittering or tweeting or whatever.